17-7PH Flange Bolting
Belleville Washer
Bolting Size 1/4” to 4”
Custom Size & Inch Size Available
17-7PH is an austenitic chromium-nickel precipitation-hardening stainless steel with good formability and excellent fatigue properties as well as good corrosion resistance.
17-7PH offers high strength by heat treatments to condition CH900, RH950 or TH1050.
In its heat-treated condition, 17-7PH provides exceptional mechanical properties at temperatures up to 480 °C (about 900 °F).
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17-7PH Standards |
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Material No. |
EN Designation |
AISI/SAE |
UNS |
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1.4568 |
X7CrNiAl17-7 |
631 |
S17700 |
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Chemical Composition |
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Carbon |
Aluminum |
Nickel |
Chromium |
Silicon |
Manganese |
Phosphorus |
Sulfonium |
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≤0.09% |
0.70-1.50% |
6.50-7.75% |
16.0-18.0% |
≤1.00% |
≤1.00% |
≤0.04% |
≤0.03% |
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Optimum Flange Bolting Belleville Washers will maintain adequate seal pressure and provide increased tension when the bolts creep and stretched by differential expansion between flange and the bolts.
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Optimum Engineering department can assist in designing the proper dimensions for your application. For additional information, dimension table and catalogue, please contact 7/24 service Email susie@optimum-spring.com.
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